Why the delay in annexing the lone star republic into the us and why did the us annex teas?

The annexation of the Lone Star Republic, or Texas, was delayed due to several factors, including concerns over the expansion of slavery and the potential for conflict with Mexico, which still considered Texas part of its territory. Additionally, political divisions within the U.S. made the issue contentious, as many Northerners opposed the addition of another slave state. Ultimately, the U.S. annexed Texas in 1845 to expand its territory and fulfill the idea of Manifest Destiny, which encouraged American expansion across the continent. The annexation also aimed to strengthen the U.S. strategically and economically.